Research-backed review design.
FSRS scheduling, typed free recall, listening-first checks, and bidirectional cards make review sessions tighter and more diagnostic.
Less busywork. More useful forgetting curves.
Native iOS study for adults
Build a language with a method that actually sticks.
TongueForge is a spaced-repetition app for people studying properly: typed recall, sentence context, fast local-first reviews, and none of the game-layer noise.
How it differs
Serious tool, not streak theater.
TongueForge is designed for adult learners reactivating dormant skills or building real production ability, not casual tap-through practice.
Typical gamified apps
Easy interaction, easy forgetting.
Recognition-heavy: multiple choice and swipe gestures let weak memories slide by.
Streak pressure: the routine becomes the product, even when the recall is shallow.
Thin context: isolated words rarely prepare you to speak or parse the real language.
TongueForge
Harder in the productive way.
Typed answers: you retrieve the word, tense, or phrase instead of spotting it.
Sentence context: cards live inside real usage, so meaning and form stay attached.
Review quality first: reverse cards, interleaving, and feedback expose the gaps you actually need to fix.
Why adults choose it
Three reasons it feels different immediately.
Content with real range.
Vocabulary, conjugation, cloze grammar, collocations, and situational phrases are curated and gated to your CEFR level.
A1 upward, without drowning you in the wrong material.Native, private, and fast.
Built with SwiftUI and SwiftData, fully local-first, and shipped without third-party dependencies or trackers.
Your study data stays on your device, even offline.
Inside the app
Built to be used every day.
The daily loop, end to end: see what's due, review by typing and getting corrected, and read progress that actually means something.
Today — what to review, at a glance
Review — type it, get corrected
Progress — readable, honest signal
Science teaser
Desirable difficulty is the point.
Bjork's idea is simple: if practice feels too easy, it usually is. TongueForge turns that into a daily review system with better timing, harder recall, real context, and tutor-like correction.